{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\hline\hline
                    &\multicolumn{1}{c}{\specialcell{\;Distance \\ HH-WS (m)}}&\multicolumn{1}{c}{\specialcell{\;\;\;Distance \\ HH-WS (min)}}&\multicolumn{1}{c}{\specialcell{Observed \\ \; storage}}&\multicolumn{1}{c}{\specialcell{Reported \\ \; storage}}\\\cmidrule(lr){2-2}\cmidrule(lr){3-3}\cmidrule(lr){4-4}\cmidrule(lr){5-5}
                    &\multicolumn{1}{c}{(1)}   &\multicolumn{1}{c}{(2)}   &\multicolumn{1}{c}{(3)}   &\multicolumn{1}{c}{(4)}   \\
\hline
Wells installed per household&      89.111   &      12.243***&       0.878   &       1.962   \\
                    &   (176.038)   &     (3.278)   &     (3.725)   &     (3.979)   \\
\hline
First stage F-statistic&        89.4   &        91.7   &        93.5   &        93.5   \\
R$^2$               &        0.01   &        0.01   &        0.02   &        0.02   \\
N                   &        5832   &        5729   &        6050   &        6051   \\
\hline\hline
\end{tabular}
}
